Dr. Peter Salama of the World Health Organization (WHO) said in Geneva that the first phase — protecting urban centres and towns — “has gone well, and we can be cautiously optimistic.”

There have been 62 Ebola cases in the DRC during this latest oubreak, with 38 confirmations and 27 deaths.

The latest case, confirmed on Thursday, is in the remote Iboko health zone in the nort-hwest: an indication that the outbreak is ongoing.

Dr. Salama, the UN health agency’s Deputy Director-General for Emergency Preparedness and Response, was fresh from a two-day visit to the DRC.

“There’s been very strong progress in the outbreak response, particularly in relation to two of the initial three sites: Mbandaka and Bikoro,” he said.

Mbandaka, in northwest DRC, has a population of around one million.

It is the capital of Equateur province, where the small town of Bikoro also is located.

“We’re cautiously optimistic but there’s a lot of very tough work to do in phase two before we say that we’re on the top of this outbreak,” said Dr. Salama. “And we’ve learned the hard way in the past never to underestimate Ebola.”

The focus now is on rural isolated communities in the Iboko health zone which will present logistical and other challenges.

He described it as among the most remote territory on Earth, mainly inhabited by indigenous populations. WHO currently has 80 staff in the area.

“We’re talking about an enormous logistical effort required to reach every alert of a case. And then if there is a confirmation of a case, every contact of those cases,” he explained.